65 lines
2.1 KiB
Ruby
65 lines
2.1 KiB
Ruby
class Favorite
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attr_accessor :attributes, :errors
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def self.table_name_for(user_id)
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"favorites_#{user_id.to_i % 10}"
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end
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def self.create(attributes)
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user_id = attributes[:user_id]
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post_id = attributes[:post_id]
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execute_sql("INSERT INTO #{table_name_for(user_id)} (user_id, post_id) VALUES (?, ?)", user_id, post_id)
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rescue ActiveRecord::RecordNotUnique
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# ignore
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end
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def self.count(user_id)
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select_value_sql("SELECT COUNT(*) FROM #{table_name_for(user_id)}").to_i
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end
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def self.destroy(conditions)
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if conditions[:user_id] && conditions[:post_id]
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destroy_for_post_and_user(conditions[:post_id], conditions[:user_id])
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elsif conditions[:user_id]
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destroy_for_user(conditions[:user_id])
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elsif conditions[:post_id]
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destroy_for_post(conditions[:post_id])
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end
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end
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def self.exists?(conditions)
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if conditions[:user_id] && conditions[:post_id]
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select_value_sql("SELECT 1 FROM #{table_name_for(conditions[:user_id])} WHERE user_id = ? AND post_id = ?", conditions[:user_id], conditions[:post_id])
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elsif conditions[:user_id]
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select_value_sql("SELECT 1 FROM #{table_name_for(conditions[:user_id])} WHERE user_id = ?", conditions[:user_id])
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elsif conditions[:post_id]
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select_value_sql("SELECT 1 FROM #{table_name_for(conditions[:user_id])} WHERE post_id = ?", conditions[:post_id])
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else
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false
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end
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end
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private
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def self.destroy_for_post_and_user(post_id, user_id)
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execute_sql("DELETE FROM #{table_name_for(user_id)} WHERE post_id = #{post_id} AND user_id = #{user_id}")
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end
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def self.destroy_for_post(post)
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0.upto(9) do |i|
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execute_sql("DELETE FROM favorites_#{i} WHERE post_id = #{post.id}")
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end
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end
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def self.destroy_for_user(user)
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execute_sql("DELETE FROM #{table_name_for(user)} WHERE user_id = #{user.id}")
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end
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def self.select_value_sql(sql, *params)
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ActiveRecord::Base.select_value_sql(sql, *params)
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end
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def self.execute_sql(sql, *params)
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ActiveRecord::Base.execute_sql(sql, *params)
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end
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end
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